Shortpass Filter
Shortpass Filters are precision optical filters designed to transmit wavelengths below the cut-off wavelength while blocking longer wavelengths. Using advanced dielectric coating technology, shortpass filters provide high transmission within the target spectral range and effective blocking outside the transmission band. Chenyu Optics manufactures shortpass filters in optical glass and fused silica with custom cut-off wavelengths, substrate materials and coating options.
Shortpass Filter Overview
Shortpass Filters are precision optical filters designed to transmit shorter wavelengths while blocking unwanted longer wavelengths beyond the cut-off range.
Using advanced dielectric coating technology, shortpass filters provide high transmission within the target spectral range and effective blocking outside the transmission band. They are widely used in fluorescence imaging, machine vision, optical sensing, UV imaging and laser measurement systems.
Chenyu Optics supports custom shortpass filter manufacturing according to customer drawings, including custom substrate materials, dimensions, cut-off wavelengths, thicknesses and coating designs for prototype and repeat production.
Key Advantages of Shortpass Filter
Fluorescence Imaging & UV Imaging Systems
Shortpass filters are widely used for short wavelength isolation in fluorescence imaging systems, UV imaging equipment, machine vision and optical sensing instruments.
Typical Specifications of Shortpass Filter
| Material Options | Optical Glass, BK7, Fused Silica |
|---|---|
| Coating Type | Dielectric shortpass coating |
| Optical Function | Short wavelength transmission / long wavelength blocking |
| Cut-off Wavelength | Customizable |
| Transmission Band | Customizable |
| Transmission | High transmission within target passband |
| Blocking | High optical density at longer wavelengths |
| Surface Quality | High precision optical finish |
Spectral Transmission Curve (Typical)
Why Choose Chenyu Optics for Shortpass Filter
Chenyu Optics focuses on drawing-based precision filter manufacturing for fluorescence imaging, machine vision, UV imaging and industrial optical systems. We support prototype verification, small-batch production and repeat manufacturing for non-standard shortpass filters.
Manufacturing Capability for Shortpass Filter
Precision Polishing
High surface quality processing for stable filter performance.
Dielectric Coating
High performance dielectric shortpass coating for precise cut-off wavelength control.
Inspection & Packaging
Strict quality control on cut-off wavelength, transmission and blocking, with clean protective packaging before shipment.
Custom Shortpass Filter Options
Cutoff Filter Type Comparison
| Filter Type | Cutoff Behavior | Peak Transmission | Blocking (OD) | Typical Applications |
|---|---|---|---|---|
| Shortpass Filter | Transmits short, blocks long | >90% | OD4 – OD6+ | Fluorescence, UV imaging |
| Longpass Filter | Transmits long, blocks short | >90% | OD4 – OD6+ | Fluorescence, spectroscopy |
| Dichroic Shortpass Filter | Transmits short, reflects long | >90% | OD4 – OD6+ | Beam separation, laser systems |
| Bandpass Filter | Transmits selected band only | >90% | OD4 – OD6+ | Machine vision, instrumentation |
Applications of Shortpass Filter
Fluorescence Imaging Systems
Short wavelength isolation for fluorescence excitation paths.
Machine Vision Systems
Spectral edge control for machine vision and inspection equipment.
UV Imaging Systems
Visible and infrared light rejection for UV-sensitive imaging.
Optical Sensing Systems
Short wavelength selection for optical sensor design.
Laser Measurement Systems
Spectral filtering for laser wavelength measurement instruments.
Spectral Analysis Instruments
Precise cut-off control for spectral analysis and instrumentation.
Shortpass Filter FAQ
What is a shortpass filter used for?
A shortpass filter transmits wavelengths below a defined cut-off while blocking longer wavelengths.
What parameters define a shortpass filter?
Key parameters include cut-off wavelength, transmission band, peak transmission, optical density blocking, and incident angle.
How is a shortpass filter different from a longpass filter?
A shortpass filter transmits shorter wavelengths and blocks longer ones, while a longpass filter does the opposite.
Can shortpass filters be customized for different cut-off wavelengths?
Yes. Filters can be customized for UV, visible, and near-infrared cut-off wavelengths.
Does incident angle affect shortpass filter performance?
Yes. The cut-off wavelength can shift with incident angle, so coating design should match the optical setup.
What information should I provide for a quotation?
Please provide cut-off wavelength, transmission band, substrate material, dimensions, angle of incidence, quantity and drawing if available.
Where can I learn more about shortpass filter design?
Additional information on shortpass filter design can be found from Edmund Optics.
Related Products for Shortpass Filter
Need Custom Shortpass Filters?
Send us your cut-off wavelength, transmission band, substrate, dimensions, coating requirements and quantity. Chenyu Optics will review the optical and mechanical specifications and provide a suitable shortpass filter manufacturing suggestion.